public bool GetNormals(out Vector3[] normals, int usageIndex)
{
normals = null;
VertexLayout vertexLayout = GetVertexLayout(0);
if (vertexLayout == null)
{
return(false);
}
VertexLayout.Entry.DataTypes dataType;
int streamOffset;
int streamIndex;
//todo: if normal does not exist, we can determine it from the tangent and binormal, if it exists
bool normalExists = vertexLayout.GetEntryInfo(VertexLayout.Entry.DataUsages.Normal, usageIndex, out dataType, out streamIndex, out streamOffset);
if (!normalExists)
{
return(false);
}
normals = new Vector3[VertexCount];
Mesh.VertexStream vertexStream = VertexStreams[streamIndex];
switch (dataType)
{
case VertexLayout.Entry.DataTypes.Float3:
{
vertexStream.ReadFloat3s(normals, streamOffset, 0, (int)VertexCount);
}
break;
case VertexLayout.Entry.DataTypes.ubyte4n:
{
vertexStream.ReadUByte4Ns(normals, streamOffset, 0, (int)VertexCount);
}
break;
default:
break;
}
return(true);
}
public bool GetTexCoords(out Vector2[] texCoords, int usageIndex)
{
texCoords = null;
VertexLayout vertexLayout = GetVertexLayout(0);
if (vertexLayout == null)
{
return(false);
}
VertexLayout.Entry.DataTypes dataType;
int streamOffset;
int streamIndex;
bool texcoordExists = vertexLayout.GetEntryInfo(VertexLayout.Entry.DataUsages.Texcoord, usageIndex, out dataType, out streamIndex, out streamOffset);
if (!texcoordExists)
{
return(false);
}
texCoords = new Vector2[VertexCount];
Mesh.VertexStream vertexStream = VertexStreams[streamIndex];
switch (dataType)
{
case VertexLayout.Entry.DataTypes.Float2:
{
vertexStream.ReadFloat2s(texCoords, streamOffset, 0, (int)VertexCount);
}
break;
case VertexLayout.Entry.DataTypes.float16_2:
{
vertexStream.ReadHalf2s(texCoords, streamOffset, 0, (int)VertexCount);
}
break;
default:
break;
}
return(true);
}
public bool GetPositions(out List <Vector3> positions, int usageIndex)
{
positions = null;
VertexLayout vertexLayout = GetVertexLayout(0);
if (vertexLayout == null)
{
return(false);
}
VertexLayout.Entry.DataTypes dataType;
int streamOffset;
int streamIndex;
bool positionExists = vertexLayout.GetEntryInfo(VertexLayout.Entry.DataUsages.Position, usageIndex, out dataType, out streamIndex, out streamOffset);
if (!positionExists)
{
return(false);
}
positions = new List <Vector3>((int)VertexCount);
Mesh.VertexStream vertexStream = VertexStreams[streamIndex];
switch (dataType)
{
case VertexLayout.Entry.DataTypes.Float3:
{
vertexStream.ReadFloat3s(positions, streamOffset, 0, (int)VertexCount);
}
break;
default:
break;
}
return(true);
}
